An unusual vintage Czech glass decanter with 5 cups, mold pressed in the end of day or slag glass method of production. The decanter and cups are black glass with red and copper dust spots of glass covering most of the surface. The decanter stopper is black. The set is in excellent condition with no cracks of chips. The pieces are unmarked. As the base of the decanter is not flame finished, an acid mark would not have shown up. Most likely some sort of label was affixed and long gone. A beautiful and unusual example of Czechoslovakian glass produced in the period between 1920 and 1938.